31040131 has 4 divisors (see below), whose sum is σ = 31095064. Its totient is φ = 30985200.

The previous prime is 31040117. The next prime is 31040137. The reversal of 31040131 is 13104013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13104013 = 13 ⋅1008001.

It is a cyclic number.

It is not a de Polignac number, because 31040131 - 2¹¹ = 31038083 is a prime.

It is a super-2 number, since 2×31040131² = 1926979464994322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31040137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26610 + ... + 27751.

It is an arithmetic number, because the mean of its divisors is an integer number (7773766).

Almost surely, 2^31040131 is an apocalyptic number.

31040131 is a deficient number, since it is larger than the sum of its proper divisors (54933).

31040131 is an equidigital number, since it uses as much as digits as its factorization.

31040131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54932.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 31040131 is about 5571.3670674261. The cubic root of 31040131 is about 314.2735624286.

Adding to 31040131 its reverse (13104013), we get a palindrome (44144144).

The spelling of 31040131 in words is "thirty-one million, forty thousand, one hundred thirty-one".